Yes, indeed, according to Rabbi Solomon ben Adret (Rashba), it may seem difficult at first glance, since according to his opinion the reason for the mitzvah of matzah is to commemorate the haste of leaving Egypt, and here there was no haste when eating the matzah. Even if it is said that he was compelled to eat due to the reason, as clarified by the Gaon of Rogatchov (Tzafnat Paneach, Parshat Vayikra, chapter 6, Laws of Chametz and Matzah, Halacha 3), that is why the Gemara uses the term "kefa'uhu Parsayim" (they forced him like Persians), and not "goyim" (nations) in general, because Persians have a custom of compelling at the time of their eating, as explained in the Gemara (Berachot 46b). Nevertheless, it is obvious that there is no element of free choice in this. Rabbi Yosef Shalom Elyashiv also questioned this in his notes on Tractate Rosh Hashanah regarding the Shulchan Aruch (Orach Chayim 476:7) who ruled in accordance with the Rashba.